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1.25ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG777606396

Shape and cutting style on the report: Round brilliant

Certificate IGI LG777606396

Diamond specifications and retailer prices

From $507 NZD
As of November 4, 2026
Save $1,242 NZD (71%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,749 NZD at MOH London · As of November 2, 2026
View at MOH London

About this 1.25ct lab-grown round diamond

This 1.25ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG777606396 or 777606396. Listed at 9 retailers as of November 2, 2026, with prices from $507 to $1,749, a $1,242 spread on the same certified stone. MOH London lists it at $1,749. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.25
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG777606396
Dimensions6.99 × 6.98 × 4.17 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.99 mm6.98 mm1.25 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG777606396
Side View
Table 59.0%Crown 32.9°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 59.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $1,749 NZD|Low: $507 NZD|High: $1,769 NZD|Avg: $978 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 4, 2026
Retailer 7$507 NZD
Retailer 2$658 NZD
Retailer 3$697 NZD
Retailer 5$836 NZD
Retailer 6$953 NZD
Retailer 4$1,441 NZD
MOH London$1,749 NZD

39 data points across 7 retailers

9 retailers$507 NZD to $1,749 NZD

B+
Cheapest Retailer
-
$507 NZD
A
Retailer 2
-
$658 NZD
View
Retailer 3
-
$697 NZD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$710 NZD
View
B+
Retailer 5
-
$836 NZD
View
B+
Retailer 6
-
$953 NZD
View
B
Retailer 7
-
$1,299 NZD
View
B
Retailer 8
-
$1,441 NZD
View
Most Expensive
B
MOH London
LG777606396 · Nov 2
$1,749 NZD
£774 GBP
View
8 more retailers have this diamond
Prices start from $507 NZDSave up to $1,242 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.25ct Round
$507 NZD